Changes to Update a Fleet Server host

the response property item/secrets/ssl/agent_key became nullable for the status 200

the response property item/secrets/ssl/es_key became nullable for the status 200

the response property item/secrets/ssl/key became nullable for the status 200

added the new optional request property allow_edit

the request property secrets/ssl/agent_key became nullable

the request property secrets/ssl/es_key became nullable

the request property secrets/ssl/key became nullable

added the optional property item/allow_edit to the response with the 200 status

the request property proxy_id became optional